"herd immunity"
AND coronavirus* OR covid* OR pandemic* OR epidemic*
If you have problems logging into library databases, see:
For quick overviews of your research topic, start with these encyclopedia-like databases.
For general subjects:
For specialized subjects:
Alternate search engines for searching the free web.
Make sure to search the ProQuest Central and Statista databases:
Fill in any research gaps with these article databases:
If you're new to searching specific databases, these tutorials may help:
How do you know a "Scholarly Article" (also referred to as academic articles or peer-reviewed articles) when you come across one?
Articles in different fields may differ slightly (a scholarly article comparing two works of literature will lack data, graphs, and discussions of methodology, while a paper on the study of a new medication SHOULD have all of those things).
Here are a link to a search and an example of a peer-reviewed (scholarly) article: